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- Heldin, J., et al.
(författare)
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Clinical Remission of Asthma and Allergic Rhinitis- in a Longitudinal Population Study
- 2022
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Ingår i: Journal of Asthma and Allergy. - 1178-6965. ; 15, s. 1569-1578
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Tidskriftsartikel (refereegranskat)abstract
- Background: Although asthma and allergic rhinitis are chronic diseases, some patients experience periods of remission. Information on prognostic factors associated with the remission of asthma and allergic rhinitis is valuable in resource prioritization. This study investigated factors associated with the clinical remission of asthma and allergic rhinitis.Methods: In the Respiratory Health In Northern Europe (RHINE) study, data was collected with questionnaires in stage one (RHINE I, 1989-1992) and two follow-ups (RHINE II, 1999-2001 and RHINE III, 2010-2012) from Sweden, Norway, Denmark, Iceland and Estonia. Clinical remission was defined as having reported asthma or allergic rhinitis in RHINE I or RHINE II but not in RHINE III.Results: Of 13,052 participants, 975 (7.5%) reported asthma in RHINE I or RHINE II, and 3379 (25.9%) allergic rhinitis. Clinical remission of asthma and allergic rhinitis was found in 46.4% and 31.8%, respectively. Living in Estonia (OR (95% CI) 2.44 (1.22- 4.85)) and living in an apartment (1.45 (1.06-1.98)) were related to remission of asthma, while subjects reporting allergic rhinitis (0.68 (0.51-0.90)), asthma onset <= 12 years of age (0.49 (0.35-0.68)), receiving treatment with antibiotics for respiratory illness (0.64 (0.47- 0.87)) were less likely to have asthma remission. Factors related to a higher likelihood of remission of allergic rhinitis were no asthma at baseline, age >= 58 years in RHINE III, allergic rhinitis onset after 12 years of age, living in rural areas as a child, having only a primary school education and not being pregnant.Conclusion: Clinical remission was found in almost one-half of those with asthma and one-third of persons with allergic rhinitis. Coexisting allergic symptoms were associated with less clinical asthma remission. Age, asthma symptoms and environmental factors in childhood, such as living in a rural area, were found to influence the clinical remission of allergic rhinitis.
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- Kisiel, M. A., et al.
(författare)
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Risk Factors for the Absence of Diagnosis of Asthma Despite Disease Symptoms: Results from the Swedish GA2LEN Study
- 2022
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Ingår i: Journal of Asthma and Allergy. - 1178-6965. ; 15, s. 179-186
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Tidskriftsartikel (refereegranskat)abstract
- Background: Asthma is a common chronic disease presenting with airway symptoms such as wheezing, chest tightness and attacks of breathlessness. Underdiagnosis of asthma is common and correlates to negative outcomes such as a lower quality of life and reduced work capacity. Purpose: This study aims to identify factors for not being diagnosed with asthma if presenting with asthma symptoms. Patients and Methods: A questionnaire was sent to 45,000 subjects (age 16-74 years) in Sweden. Subjects who reported both wheeze and breathlessness and wheeze when not having a cold were defined as having asthma-related symptoms. Data on demographics, educational level, smoking, physical activity, comorbidities, symptoms and asthma were collected. Logistic regression was used to identify risk factors for not being diagnosed with asthma. Results: Of the 25,391 who responded to the survey, 6.2% reported asthma-related symptoms. Of these, 946 had been diagnosed with asthma previously, while 632 had not. Independent risk factors for not being diagnosed with asthma were higher age (OR (95% CI) (2.17 (1.39-3.40))), male sex (1.46 (1.17-1.81)), current smoking (2.92 (2.22-3.84)), low level of education (1.43 (1.01-2.01)), low physical activity (1.36 (1.06-1.74)), and hypertension (1.50 (1.06-2.12)). Conclusion: Men, smokers, older subjects, and those with low educational level or low physical activity are less likely to be diagnosed with asthma despite presenting asthma-related symptoms.
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- Lodin, Karin, et al.
(författare)
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Self-rated health is associated with fatigue, but not inflammatory cytokines or fraction of exhaled nitric oxide in men and women with allergic asthma
- 2013
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Ingår i: Brain, behavior, and immunity. - : Elsevier BV. - 0889-1591 .- 1090-2139. ; 32:Suppl., s. e31-e31
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Allergic asthma is a chronic inflammatory disorder with both local and systemic inflammation and is associated with elevated levels of cytokines as well as exhaled fraction of nitric oxide (FeNO). Fatigue is a prominent symptom. Poor self-rated health has previously been associated to fatigue and inflammatory markers. However, it is not known if self-rated health is associated with fatigue and inflammation also in patients with asthma. Here, we investigated the associations between self-rated health, fatigue, inflammatory cytokines and FeNO in patients with asthma. Self-rated health, fatigue, levels of cytokines and FeNO were assessed in 184 (93 men, 91 women) non-smoking patients with allergic asthma aged 18–64 years in a one-year longitudinal study with five repeated measurements, two for cytokine levels. Analyses of associations between repeated measurements were performed using mixed regression models. More fatigue was associated with poor self-rated health in both men and women (p < 0.001). Fatigue was also associated to elevated levels of IL-1beta and TNF-alpha in women (p < 0.01). However, no association between self-rated health, inflammatory cytokines and FeNO were found. In conclusion, fatigue is an important determinant of self-rated health also in patients with asthma. In addition, fatigue was associated to elevated levels of inflammatory cytokines in women. Possibly, variance in inflammation may be of less importance in a chronic inflammatory condition such as asthma in relation to how subjective health is appraised.
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- Ahlstedt, S, et al.
(författare)
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Enhancement of the bronchial reactivity in immunized rats by neonatal treatment with capsaicin.
- 1986
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Ingår i: International archives of allergy and applied immunology. - : S. Karger AG. - 0020-5915 .- 1018-2438 .- 1423-0097. ; 80:3, s. 262-6
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Tidskriftsartikel (refereegranskat)abstract
- Rats were injected with capsaicin at 1-2 days of age to abolish the content of substance P (SP) in nerve terminals. At 6 weeks of age the capsaicin-treated and control rats were sensitized daily for 1 or 2 subsequent weeks Monday through Friday with ovalbumin (OA). The OA was given without adjuvant as 300 ng subcutaneous (s.c.) injections in the neck region or as 1% aerosol for 30 min. The capsaicin-treated animals which were sensitized s.c. for 2 weeks reacted moderately with increased transpulmonary pressure (TPP) to airway challenge with OA, and strongly to intravenous (i.v.) challenge with OA or serotonin. The capsaicin-untreated animals, which were sensitized with OA, reacted weakly to the challenge. In the challenge. In the animals sensitized with aerosolized OA, slightly lower reactivity was seen compared with those sensitized s.c. Untreated and unsensitized control rats reacted only to serotonin challenge. No animal had any detectable serum or bronchial IgE antibodies. Aerosol-sensitized animals had IgG antibodies in both serum and bronchial lavage. Histologically, the animals treated with capsaicin in contrast to the untreated controls demonstrated a pronounced increase of lymphoid tissue around their bronchi. Their mast cell numbers were increased around vessels and in the pleura and their mucous cell numbers were increased in the epithelium of the bronchi and bronchioli. The sensitization did not add much to this histological picture.
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- Ahlstedt, S, et al.
(författare)
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Immune stimulated regional inflammatory responses mediating lung reactivity in rats.
- 1985
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Ingår i: Allergy. - : Wiley. - 0105-4538 .- 1398-9995. ; 40:4, s. 282-8
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Tidskriftsartikel (refereegranskat)abstract
- Daily sensitization of SPF BNxWi/Fu rats with ovalbumin (OA) in aerosol during 2-week periods with a 4-week interval resulted after 7 weeks in IgE, IgA and IgG antibodies in serum and bronchial fluid. After cultivation of the regional, axillary, brachial and mediastinal (ABM) lymph node cells, IgE antibodies were found in the culture supernatant. Such antibodies were not found in culture supernatants of spleen and inguinal lymph nodes. Regional formation of IgE antibodies was also noted in the ABM lymph node cell culture supernatants after subcutaneous (s.c.) injections of 100 ng OA in the neck region. When the injections were given in the tail-root region, the inguinal but not the ABM lymph nodes produced the IgE antibodies. The s.c. sensitization induced inconsistent and rather low IgG and no IgA antibody responses. The aerosol but not the s.c. sensitization induced accumulations of mononuclear cells and mucous cells in the lungs. Clinically, the rats sensitized s.c. in the neck region reacted to aerosol and intravenous (i.v.) challenge as early as 1 week after sensitization had started, whereas the animals sensitized in the tail-root regions reacted 7 and 8 weeks after repeated sensitization. The animals sensitized by aerosol showed only weak clinical reactivity after i.v. challenge.
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- de Jongste, JC, et al.
(författare)
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Gas analysis
- 2000
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Ingår i: American journal of respiratory and critical care medicine. - : American Thoracic Society. - 1073-449X .- 1535-4970. ; 162:22 Pt 2, s. S23-S27
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Tidskriftsartikel (refereegranskat)
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- FORNHEM, C, et al.
(författare)
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Allergen-induced late-phase airways obstruction in the pig: mediator release and eosinophil recruitment
- 1995
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Ingår i: The European respiratory journal. - : European Respiratory Society (ERS). - 0903-1936 .- 1399-3003. ; 8:7, s. 1100-1109
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to develop a novel model for studies of mediator mechanisms involved in the late asthmatic reaction in the lower airways, by using the sensitized pig. The release of histamine and cysteinyl-containing leukotrienes (cys-LTs), as well as the levels of inflammatory cells in blood and bronchoalveolar lavage fluid, were determined and their relationship to plasma cortisol levels and pulmonary airways obstruction was noted. Specific-pathogen free pigs were actively sensitized with Ascaris suum allergen, and one group of animals was treated with a cortisol-synthesis inhibitor (metyrapone) by constant intravenous infusion. Ascaris suum allergen was nebulized into the lower airways and total lung resistance, blood leucocyte count and urinary levels of methylhistamine and leukotriene E4 (LTE4) were followed for 8 h, whereafter bronchoalveolar lavage was performed for analysis of leucocytes. An increase in urinary methylhistamine and LTE4 was seen during the acute allergic reaction in both groups of pigs. Metyrapone treatment prolonged the acute release of histamine, and this was seen together with a prolonged acute bronchoconstrictor response. In metyrapone-treated pigs, a continuous release over 8 h was seen for cys-LTs, but not for histamine. A late blood eosinophilia was also seen in metyrapone-treated animals, starting 4-6 h after allergen challenge. Late cys-LT release and eosinophilia were absent in non-metyrapone-treated animals. These results suggest that allergen-induced late release of cys-LTs as well as blood eosinophilia occur simultaneously with late-phase airways obstruction in the pig, and that all these reactions are prevented by high levels of endogenous cortisol.
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